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1.
Following what is going on in someone's life by watching their status messages on Instant Messengers such as MSN, and their updates to their social networking profiles on websites like Facebook or MySpace. Akin to stalking in the real world, but usually done to people who are your friends that would normally share this information with you, however you're just too busy to keep up conversation with them.
I see you've got a new cat, dumped your girlfriend, moved to a new apartment, had a fight with your sister, and your goldfish died. Yes, it's true, I've been creeping you, just been so busy with finals that I haven't had a chance to call or write until now.
by CA34Chris May 11, 2007
 
2.
Banging someone while you're taken.
Shaggy's girlfriend caught him red-handed creepin' with the girl next door.
by Kara E. June 01, 2005
 
3.
1. The act of hitting on chicks when you are black-out drunk in hopes of hooking up with them. The act is usually committed by a person who is know to frequently do this, a creeper.
2. The act of macking on extremely drunk chicks when you are still sober, also a common act done by creepers.
Man look at that fool rube, he's creeping all over thoose fine ladies eventhough they don't want none.
by Juicey Juice April 01, 2006
 
4.
to be creepy or stalk someone inappropriately.
Liam Gibbs is creeping on Stephanie.
by sussiee July 08, 2009
 
5.
when a man is trying to go after someone who is takin'.
Man that guy is creepin on your girl
by Liz July 27, 2003
 
6.
The act of sleeping with another person while already going out with/being married to someone
Yo I think my girl is doing something with someone else
Word, shes creeping.
by Lucci October 29, 2007
 
7.
To scan Facebook constantly, looking at everyone's profiles, interests, photos, etc. Often done on attractive people, or young boys in girls, and bets are placed as to who will grow up sexy.

Creeping is commonly done by jealous or skeptical girlfriends, to make sure their boyfriend is not talking to other girls, or commenting on their pictures.

Creeping is a common habit which is acceptable to a certain point. You know you have a problem when you know a little something about every kid in the upcoming grade 8 class, and you are graduated..
girl 1: Omg did you know ashley and john broke up :'(

girl 2: um.. no.. you never even talked to her in your whole life whats the problem?

girl 1: well i was creeping her so much i feel like were friends.

girl 2: ah. well then. continue.
by Rambo1107 February 03, 2010